Knockdown box



. V I W 3/ 1954 E. L. ARNESON 2,686,001

KNOCKDOWN BOX Filed Nov. 22, 1950 IIW y IN V EN T OR. Ida/z Z. 697265072, Y

Patented Aug. 10, 1954 UNITED KNOCKDOWN BOX Edwin L. Arneson, Morris, 111., assignor to Morris Paper Mills, Chicago, 111., a corporation of Illinois Application November 22, 1950, Serial No. 197,053

1 Claim. 1

The present invention relates to new and useful improvements and innovations in knocked-down type boxes or carton halves which are adapted to be readily and quickly set up for use from a flattened or knocked-down condition, and in a preferred form projecting ears on the end walls automatically snap into place in recesses in the ends of the adjacent side walls.

An important object of the invention is to provide a knocked-down type carton or box half constructed from a single blank of paperboard or other suitable material wherein the side walls or end walls, or both, are formed by folding over an end flap and securing or anchoring the bottom edge of the inner ply to the base panel in spaced relationship from the outer ply whereby the end or side wall formed by the plies tends to turn inwardly and resists outward displacement.

Still another object of the invention is to provide a knocked-down type carton or box half of the class described which is automatic in the sense that projecting ears on the opposite end walls automatically catch into the openings in the adjacent ends of the side walls, such openings resulting from the spacing of the inner fold or ply of the side walls from the outer fold or ply adjacent the bottoms thereof so as to bias the side walls inwardly toward each other and cause them to resist outward deformation.

Certain other object of the invention will, in part, be obvious and will, in part, appear hereinafter.

For a more complete understanding of the nature and scope of the invention, reference may now be had to the following detailed description of a preferred embodiment thereof taken in connection with the accompanying drawing, wherein:

Fig. 1 is a plan view of a paperboard blank from which a carton-half embodying the present invention is made;

Fig. 2 is a top plan view of a box-half formed from the blank shown in Fig. 1, the box-half being shown in knocked-down condition except for one of the ends which is shown lifted up, and a part of one of the longitudinal side walls being broken away and shown in section;

Fig. 3 is a top perspective View of the box-half of Fig. 2 shown in its erected condition;

Fig. 4 is a vertical sectional view taken on line 4-4 of Fig. 3; and

Fig. 5 is a transverse vertical sectional view taken on line 55 of Fig. 3.

In Fig. 1 of the drawing the single blank from which the carton-half is formed is indicated gen- 2 erally at 5. Usually the blank 5 will be out from paperboard although any other similar material may be used where desirable and economical. The blank 5 has a central or bottom panel 5. The blank 5 is so formed that flaps 7-? project from opposite sides of the panel 6 while flaps 88 project from opposite ends thereof. The flaps I when suitably folded and anchored provide the opposing side walls Ill-Ill (Fig. 3) in the completed construction while the end flaps 8 in like manner provide the end walls ll I. Each of the side flaps l is connected to the main panel 6 along a score line l2 and is divided into three sections l3, l4 and I5 by the score lines It and Il. Each of the end fiaps-8 is connected with the panel 6 along a score line is andis divided into three section 2i], 2! and 22 by means of score lines 23 and 26.

Each of the'sections l3 extends the full length of the panel 6 while the adjoining sections it are slightly shorter as indicated at 25-25/ Each of the sections I5 is cut out at the end as indicated at 26 for a width at least equal to the width of the sections 22 of the end flaps 8. This provides a clearance in the final construction as indicated at 21-2? (Figs. 2 and 3). In the completed construction the inner section i3 of'each side flap 1 constitutes the outer ply of the side wall It] while the intermediate section l-L, constitutes the inner ply thereof. The outer section l5 of each flap 1 serves as the anchoring flap or section as will be explained in greater detail below.

Each inner section 2!! of each end flap 8 is scored along lines 28-48 so as to provide locking ears 39-38 on the end Walls I l. The intermediate sections 2| are cut away at the ends as indicated at 3'|3l so as to expose the adjacent ears 30;

After the blanks 5 have been out, glue is applied to the side flap sections l5-l5 and to the end flap sections 2222, as indicated in Fig. 1. Each of the intermediate sections ill of the side flaps l is then folded over on the inner section I3 along the fold or crease line it while the outer anchoring flap I5 is folded backward along the crease line 60. The anchoring flap i5 is then applied to the face of the panel 6 so as to anchor it thereto. It is an important feature of the invention to have the anchoring flaps l5 so positioned on the panel 6 as to provide a space between the inner and outer plies l3 and M as designated at 32-42 (Figs. 2 and 5). This spacing arrangement tends to cause each of the end walls to be inclined inwardly toward the other so as to resist outward displacement.

In like manner, each of the end flaps 8 is folded along the score lines 2323 so as to fold the intermediate section 2! over onto the inner section 28 and then the outer anchoring flap section 22 is turned reversely along the score line E i and is then applied :to the panel 6. The anchoring flaps 22 are also applied to the panel 6 in such a way as to provide spacing between the inner and outer plies 20 and 2| of each of the end walls H, as indicated at 33 (Fig. l). This spacing causes each of the end walls H to resist outward distortion.

The carton halves made from the "blank '5 are packaged and shipped in flattened or knockeddown condition. The end walls 1?! are folded down on the panel 6 and then the side walls It are folded down over the end walls as shown at the left-hand end of Fig. 2. When it is desired 'to erect one of thecartonlhalves, this operation :is readily performed by lifting up each of the end walls H. This lifting operation automatically'raises the side walls l E} iandas soonas each of the cars 30 on the opposite ends of the walls 11 clears the adjacent end of the inner ply M the ear slips into the opening 32 as shown in Figs.'3 and 4. Because theopposingwalls '1 %HB and I l--'l l are biased inwardly toward each other, the carton-half maintains its erected-or assembled condition by itself without additional means of .securement.

If it is desired to flatten out one of the carton halves, this operation -is easily performed by bending outwardly each of the end walls Ii so as to free the locking ears '38 and then inserting it in between the adjacent ends of the side walls It).

In view of the foregoing description, icertain modifications of an obvious nature will be apparent to those skilled in the art. For example, instead of obtaining clearance between the ends .of the anchoring flaps '2222 and iii-l by cutting away from the flaps as indicated :at 26,*both of the flaps I51and 22 can be cutaway at the ends an equal amount, or the flaps 22 can be cut away at the end instead of the flaps 1'5. In like manner, instead of having the ears 38 formed on the outer plies 20, they may beiormed on the inner ply 2| and the outer plies :26 :may be cut away so "as to expose such cars. If the material is sufiic'iently flexible, it is possible to form the ears on the ends of the end walls by merelybending'over both thicknesses of theinner and outer plies without removing any portion of either.

Since these and certain other changes may be made in the foregoing construction without departing from the spirit and scope of the invention, all matter shown in the accompanying drawing or described above is intended to be interpreted as illustrative and not in a limiting sense.

What I claim as new is:

A knock-down type carton-half formed from a single blank and comprising a rectangular bottom panel and opposing end and side walls, each or said side walls comprising an outer ply which is integrally connected with the adjacent edge of said bottom panel along a score line, and an inner ply which is shorter in height than said outer wall and which is integrally connected directly with said outer ply along a score line following the top edge of said outer ply, the bot tom edge of said inner ply being maintained in spaced relationship with the bottom edge of said outer "ply and said side wall being maintained at a substantial inwardly inclined angle by means of an anchoring flap integrally connected to the bottom edge of said inner ply along a score line and which anchoring flap is turned in'toward the middle of said bottom panel and permanently secured fiatwise thereon, and each of said end walls being formed of a rectangular flap and comprising an outer ply which is integrally connected with the adjacent edge of said bottom panel along a score line, and an inner ply which is integrally connected directly with said outer ply along a score line following the top edge of said outer ply, the bottom edge of said inner ply being maintained in spaced relationship with the bottom edge of said outer ply by means of an anchoring flap integrally connected to the bottom edge oi said inner ply along a score line and which anchoring flap is'turned in toward the middle of said bottom panel and permanently secured flatwise thereon, each of said inner plies of said end wall being cut away at the opposite ends thereof so as to expose locking ears on the adjacent opposite ends of said outer ply, said ears being formed by diagonal score lines extending from the outer end of the score line between said outer ply and said bottom panel to the adjacent end of said score line between said inner and outer plies, each of said locking ears when said carton-half is erected slipping in between the inner and outer plies of said side wall at the adjacent end thereof.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 1,492,951 Auerbach May 6, 1924 2,331,038 Meller Get. 5, 1943 2,334,425 Lowey Nov. 16, 1943 2,345,716 Smith Apr l, 1944 2,519,831 Frankenstein Aug. 22,1950 

